Hi,
I have an 88 GTA 5.7 I have a low voltage condition, meaning the car runs at about 9 or 10 volts now, and is going down slowly. Started reading lower and lower a few days ago. I think I must be running totally off the battery, although the battery tests currently at 11 volts ( even though the dash guage says 9 or 10). Soo, where do I touch hook up my voltmeter pos and neg pins to the alt to test it with the car running ? I have the 3 pin connector. There are 4 holes in the connector, but only 3 pins in it. The wires are red, yellow, and brown.
I think the dash guage is right, as far as the volts being low, since the wipers have gotten slow since the readings have dropped.
I'll probably take the alt out, to autozone to test it, eventually, but I'd like to test whatever I can myself first.
Thanks